Plumbing fitting



FIG. 1 is a right, top, front perspective view of a plumbing fitting embodying my new design;

FIG. 2 is a right side elevational view of FIG. 1;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The plumbing fitting is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design. 

CLAIM I claim the ornamental design for a plumbing fitting, as shown and described. 